function check_login_emp1()
{
	document.getElementById("sp_load2").style.display = "block";
	window.setTimeout("check_login_emp2()",2000);
}
function check_login_emp2()
{
	
	var username = document.getElementById("emp_user").value;
	var password = document.getElementById("emp_pass").value;

	if (username=="" )
	{ 
		document.getElementById("sp_load2").style.display = "none";
		alert("กรุณากรอก username");
		return false;
	}
	if (password=="" )
	{ 
		document.getElementById("sp_load2").style.display = "none";
		alert("กรุณากรอก password");
		return false;
	}
	
	var today = new Date();
	today.setTime( today.getTime() );
	var url = "login.php?us="+username+"&pw="+password+"&td="+today;
	xmlHTTP = createXMLHttpRequest();
	xmlHTTP.open("GET", url, false);
	xmlHTTP.send('');
	var var_msg = xmlHTTP.responseText;
	//alert(var_msg);
	if(var_msg == "false")
	{
		document.getElementById("sp_load2").style.display = "none";
		alert("username or password ไม่ถูกต้อง");
		document.getElementById("emp_user").value = "";
		document.getElementById("emp_pass").value = "";
		
	}
	else
	{
		document.getElementById("sp_load2").style.display = "none";
		window.location =window.location.href;
	}
}